Hmm.....maybe I shouldn't have looked at this guide in the first place, got me all tensed up for nothing. But I needed to refer to it since I was performing really badly in the beginning. Why? Because I had the playing style of CoD4 still fresh in my mind, in CoD4, it was just you, your gun and a couple of 100 enemies which you have to kill, no complications
But when I applied this strategy to Crysis, I couldn't even eliminate the 3 troops at the first camp-site
So I referred to the guide to learn about all the powers of the nano-suit and stuff
and I also came across the fact that you don't necessarily have to eliminate all your enemies, sometimes, its just good if you pass by in front of them really quickly and ride out their assault